Figure 1.

Folding topology of the predicted LFA-1 α subunit β-propeller domain. β-Strands are arrows, predicted disulfide bonds are horizontal lines, putative Ca²⁺ ions bound to 1–2 loops are filled circles, and boundaries between FG-GAP repeats are marked with vertical dashes. The Ws are shown upright, with the 1–2 and 3–4 loops on the bottom, and 2–3 loops and 4–1 loops connecting adjacent Ws on the top.